US Open 2015: Spieth wins second major

Jordan Spieth added to his Masters victory by winning the US Open by a stroke at controversial venue Chambers Bay.

Dustin Johnson three-putted the last hole from 12 feet to finish runner-up on four under, meaning the 21-year-old Texan clinched his second major of 2015.

Spieth became the youngest winner of the year’s second major in 92 years, and remains on course to become the first player to win all four majors in a calendar year.

"I'm in shock but I feel for Dustin," said Spieth. "It's cool to be able to have two legs of the grand slam now, and to conquer golf's hardest test - the US Open is conquering the hardest layout in all of golf.